问题
选择题
I can hear the Browns' phone bell ringing but no one is answering it; they _______ be at home.
A．would
B．might
C．needn't
D．can't
答案
D
can't用在否定句中表示推测。
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I can hear the Browns' phone bell ringing but no one is answering it; they _______ be at home.
A．would
B．might
C．needn't
D．can't
D
can't用在否定句中表示推测。